Cessitrifugal separator



(No Model.)

W. JHNSON.

GBNTRIPUGAL SEP-ARMOR. l l Patented Mar. 29, 1898.

struction to separate cream from milk.

i N ITE rares *cENTR'u-'UGAL SEPARATOR.

SPECIFICATION forming part of Letters Patient No. 601,377, dated March 29, 1898. Application filed March l, 1897. Serial No. 625 ,563. (ITO model.)

To ctZZ whom it may concern.'

Be it known that I, WILLIAM JOHNSON, of Boston, in the county of Suffolk and State of Massachusetts, have invented a new and useful Improvement in Centrifugal Separators, of which the following is a specification.

My improvement is intended more especially as a household utensil of simple con- It consists of a rotatable drum secured to a spindle, said drum having a concavo-convex upper wall provided with a central opening and a bottom wall shaped to form a central chamber and a peripheral annular chamber, narrow at its upper innerportion, where it communicates with the central chamber, and gradually increasing in width upwardly and downwardly to the periphery of the drum and separate draw-off devices for the two chambers adapted to remain closed during the rotation of the drum.

This improvement will be understood by reference to the drawings, in which- Figure 1 is a side elevation, and Fig. 2 a vertical section, of a separator embodying my invention. v

A is a drum, which is of substantially the shape shown, its upper wall being concaveconvex and its lower wall being shaped to form a central chamber c and a peripheral chamber a', the peripheral chamber being wider at the bottom than at the top and being connected at the top to the central chamber by a narrowannular passage a2.

a3 is a central opening in the concavo-convex wall of the drum.

The drum is mounted on a central shaft B, set into a socket C, formed in the base D of the machine. I prefer to construct the base in the form of a bracket adapted to be suitably clamped or otherwise attached to a shelf or table E or other means of support. This casing may be rotated in any convenient way. As shown, the shaft B is provided with a gear F, which engages with a larger gear G,

`mounted on the shaft H, which turns in the base D. One end of this shaft is provided with a crank-handle J. The shaft B may be held in place in any convenient way-for eX- ample, by a groove h and set-screw c, as shown. the milk from the chamber a.

Zt is a faucet by which to draw olf- Z is an outlet from the chamber a, which is closed by means of a valve Z attached to the lower end of a loop-spring Z2, made of wire or the like. This spring Z2 has two shoulders Z3 Z3 and finger-pieces Z4, the shoulders engaging under the rim of the -opening as. By compressing the finger-pieces Zthe shoulders Z3 Z3 may be released and the valve may be lifted off its seat. This loop-spring Z2 is shown in section in Fig. 2, but in fact may be made of wire of small diameter, so that it will not interfere with the free circulation of milk or other liquid with which theseparator is used.

The chamber a should hold a somewhat Vless quantity of liquid than the central chamrotation continues centrifugal force will act to throw the heavier particles against the outerwall of the chamber a', and thus release the lighter particles, so that they will be retained in the upper part of the central chamber a until the separator stops, when they will fall down into the central chamber a,

from which they may be drawn-for example,-

as cream-through the nozzle Z by compressing the finger pieces vZ4 and removing the valve Z'.

' I am aware of United States patent to Bond, Y

an outlet adapted to remain closed 'during the rotation of the separator, all substantially as and for the purposes set forth.

2. In a rotary separator, a rotatable spindle, a drum mounted thereon and adapted to be rotated therewith, said drum containing two. chambers,one a peripheral chamber wider at the bottom than at the top, its outer wall loo sloping upward and inward toward the axis In witness whereof I have hereunto set my of the drum, and a central Chamber of greater name this 24th day of February, 1897.

capacity than said peripheral chamber and connected thereto near its top, each Chamber VILLIAM JOHNSON' 5 'being provided with an outlet adapted to re- Witnesses:

main closed during the rotation of the sepa- GEORGE O. G. COALE,

rator, all as set forth.

' E. A. GUILD. l 

